Final answer:
Pope Leo III crowning Charlemagne Emperor had significant political impacts.
Explanation:
Pope Leo III's crowning of Charlemagne as Emperor of the West in 800 had significant impacts on the political landscape of the time. It established Charlemagne as the Roman emperor, a title not held since the fall of the Western Roman Empire in 476, introducing tension between Charlemagne and the Pope but also solidifying Charlemagne's position as a powerful ruler in Western Europe. This event marked the culmination of a new society based on Christianity and close cooperation between the Church and State.
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